I've been talking to my 3rd & 4th grade gifted/talented students about the vastness of space. After telling them of what I heard on NPR, they decided they wanted to participate in the Listener Challenge. All work is done on simple construction paper.
"Astronaut says, 'Houston, we're not alone in the universe!' NASA asks, 'Did you say that we aren't alone in the universe?' Astronaut says, 'Y-es!'" -Corbin

Mike